Wiring device in direct current machine

Abstract

The wiring device in a direct current machine, includes a pigtail of a brush and a lead wire bound by a button contactor. The button contactor is formed into a generally T shape and is located at the forward end portion of the lead wire. The button contactor is received and held in a holding recess formed on a base made of resin. The holding recess is provided with an insertion recess defined by a pair of spaced and parallel side walls, for receiving the binding portion of the button contactor engageable recesses are respectively provided at corresponding opposite end portions of both side walls, and open toward each other and toward the brush. The engageable recesses receive opposite end portions of a head of the button contactor. A regulating portion is formed at an extension of the insertion recess opposite to an end face of the head of the button contactor. The lead wire includes a first flexed portion engaged with and flexed at one of the side wall end portions and a second flexed portion engaged with and flexed at wall portions erected from the base, at a position closer to a lead wire outlet than the first flexed portion. Thus the lead wire is flexed into a generally S shape for being guided.

What is claimed is: 
     
       1. A wiring device for a direct current (dc) machine having a commutator brush with a pigtail and a lead wire having a forward end portion, comprising, a generally T-shaped button contactor having a head portion with opposite ends, said head portion having an end face, said button contactor further including a binding portion of binding said pigtail and said lead wire at the forward end portion of said lead wire, a base made of resin having a molding recess for receiving and holding said button contactor, a pair of spaced and parallel side walls on said base at said holding recess to define an insertion recess for receiving the binding portion of said button contactor, said side walls having first corresponding opposite end portions, engageable recesses respectively formed at said first corresponding opposite end portions of said side walls, said first corresponding end portions defining an extension of said insertion recess, and a regulating portion formed at said holding recess at the extension portion of said insertion recess and opposite the end face of the head portion of said button contactor.   
     
     
       2. The wiring device in a dc machine as set forth in claim 1 wherein said holding recess has a bottom and said regulating portion includes a surface opposed to said head portion of said button contactor and inclined to the bottom of said holding recess so as to progressively approach the head portion of said button contactor as the surface inclines toward the bottom of said holding recess. 
     
     
       3. The wiring device in a dc machine as set forth in claim 1 including a lead wire outlet and wherein said lead wire includes a first flexed portion engaged with and flexed at one of said side walls at one of said first corresponding end portions and a second flexed portion at a position closer to the lead wire outlet than said first flexed portion, outlet wall portions formed on said base proximate the lead wire outlet such that the lead wire is engaged with and flexed at one of said outlet wall portions, whereby said lead wire is flexed into a generally S shape for being guided.